This video covers several throttle valve related operations: Cleaning, Replacing the seal, replacing the valve and checking the air hose after the filter box for damages. The shown car is a BMW E90 320i. Symptoms for a dirty throttle valve include unstable idle rpm and bad engine response.
Do not use cleaning agents while the engine is running: This flushes a lot of dirt into the engine.
Preparations:
➥ For some models, remove the acoustics cover. That requires removing the inroom air filter base. This can be seen in this video:
• BMW E90 N46 Zündspulen...
(Ignition coil cover need NOT be removed!)
➥ Remove engine air filter box
• BMW E90 N46 Luftfilter...
Tightening torques:
➥ Throttle Valve Body: 9.8 Nm
Part Numbers:
➥ Throttle valve seal: 13547504728
➥ Throttle valve (model dependant, ask in the comments when in doubt)
➥ Air hose: 13717532755
Tools:
➥ SW-8
➥ Rag
➥ Pliers (for the seal)
+ Tools mentioned in the preparation videos
✔ Requirements:
➥ Engine Code N46, N45, N42
➥ Series E9x, E87
Cost of repair:
➥ Cleaning only: 0 Euro
➥ Seal: 10 Euro
➥ Throttle Valve: ~200 Euro
➥ Air Hose: ~20 Euro
Difficulty: Easy
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